Pump-rod clamp.



No.- 834.688- PATENTED Q01. 30, 1906.

' in. w. STERLING.

' PUMP ROD CLAMP. APPLICATION nun mm. 2a. 1906.

UNITED STATES PATENT OFFICE.

PUMP-ROD CLAMP.

Specification of Letters Patent.

Patented Oct. 30, 1906.

Application filed March 28, 1906. Serial No. 308,584-

To atZZ whom, it may concern:

Be it known that 1, DAVID W. STERLING, a citizen of the United States, residing at Glade Mills, in the county of Butler and State of Pennsylvania, have invented certain new and useful Improvements in Pump-Rod Clamps,

' of which the following is a specification, reference being ing drawings.

This invention relates to a device for connecting the upper end of a string of pumprods to the rod-actuating means, and is de signed primarily for use in pumping oil and other deep wells wherein the necessary motion-is imparted through a walking-beam; and the primary object is to provide simple and efficient means for clamping the rod, the device being of such construction that it may be readily released from the rod and turned backward out of the way.

The invention is embodiedin a suspension device having depending rod embracing arms in opposing relation; and a further object is to provide arm-clamping devices of novel construction.

In the accompanying drawings, Figure 1 is a front view of the improved device with the rod clamped therein, and Fig. 2 is a side view of the same. Fig. 3 is a cross-sectional view taken on line 3 3 of Fig. 1.

Referring to the drawings, the upper portion 2 of the suspension-device is of stirrup form and adapted to embrace the outer end 3 of the walking-beam. Beneath the beam the sides of the stirrup converge inwardly at 4 to form the parallel arms 5 for clamping pump-rod 6-. The arms are preferably curved in cross-section, thereby making their hold on the rod very secure.

-Embracing arms 5 are yokes 7, and threaded through one end of each is a clampingscrew 8, the inner end of the screw being swiveled at 9 to arm 5, thereby holding the yoke in place when the clamps are not tightened up. Ordinarily two yokes are employed, one being secured by its screw to one of arms 5 and the other yoke to the other arm, thereby balancing the device.

Yokes 7 being open laterally, the pump-rod may be readily passed therethrough when connecting and disconnecting the clamp, and when in position between arms 5 it is made very secure by tightening up screws 8. When had therein to the accompanynot in use, the suspension device may be held in backwardly-drawn position and out of the way for pulling the rod or tubing.

The top of the stirrup is provided with an eyelet 10, to which may be connected a line suspended in the derrick, whereby the clamping device may be raised and lowered to and from position on the beam end without making it necessary for the workmen to mount the beam, as has been necessary heretofore when connecting and disconnecting the rodsecuring device.

I claim 1. A pump-rod clamp comprising an inverted-yoke-shaped device adapted at its upper end to embrace a walking-beam and at its lower end terminating in the elongated parallel arms 5, clamp-yokes embracing the arms, and an adjusting screw threaded through each yoke and at its inner end swiveled to one of the parallel arms.

2. A pump-rod clamp comprising a suspension device having depending opposing arms, clamp-yokes embracing the arms, and an adjusting-screw for each yoke extending therethrough and having threaded connection therewith, the inner end of the screw being swiveled to the arm.

3. A pump-rod clamp comprising a suspension device having depending opposing arms, yokes embracing said arms, and an adj usting-screw for each yoke, one screw being threaded through its yoke and swiveled to one of the arms and the other screw-threaded through its yoke and swiveled to the other arm.

4. A pump-rod clamp comprising an in verted-yoke-shaped device adapted at its upper endto embrace a walking-beam and at its lower end terminating in the parallel arms 5, clamp-yokes 7 embracing the arms and open at one side for the passage of the rod, and a clamping-screw threaded through each of yokes 7, the screws being swiveled at their inner ends each to one of said arms and operating to hold the yokes permanentlyIin position thereon.

In testimony whereof I afiix my signature in presence of two witnesses.

DAVID W. STERLING.

Witnesses:

JAMES STERLING, JAMES W. COOPER. 

